234557144721 has 27 divisors (see below), whose sum is σ = 354226336009. Its totient is φ = 149551362312.

The previous prime is 234557144707. The next prime is 234557144761. The reversal of 234557144721 is 127441755432.

The square root of 234557144721 is 484311.

It is a perfect power (a square), and thus also a powerful number.

234557144721 is a `hidden beast` number, since 2 + 3 + 4 + 5 + 571 + 4 + 4 + 72 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-234557144721 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (234557144761) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 33413950 + ... + 33420968.

Almost surely, 2^234557144721 is an apocalyptic number.

234557144721 is the 484311-st square number.

234557144721 is the 242156-th centered octagonal number.

It is an amenable number.

234557144721 is a deficient number, since it is larger than the sum of its proper divisors (119669191288).

234557144721 is an frugal number, since it uses more digits than its factorization.

234557144721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14090 (or 7045 counting only the distinct ones).

The product of its digits is 940800, while the sum is 45.

The spelling of 234557144721 in words is "two hundred thirty-four billion, five hundred fifty-seven million, one hundred forty-four thousand, seven hundred twenty-one".